It is not 20-30 hours. It's 10 hours at the very most-- there are multiple people in my FC who finished 2.1 - 2.55 in under a week by putting in a couple of hours a night.

It sucks that you can only play 30-60 minutes a day, yes, but you have to realize that your progress in the game is going to be far slower than most other peoples' because of that. For the vast majority, 2.1 - 2.55 is not a major time investment at all. It's going to be exactly the same when you finally get to HW, as its MSQ is as long as the main 2.0 story.